Apparatus for stretching fabrics.



W., T. W. H. & P. O. PHILIPSON.

APPARATUS FOR STRETGHING FABRICS.

APYLIOATION FILED MARA, 1911.

Patented July 22, 1913.

mvrrn era S PATENT OFTCE WILLIAM PHILIPSON, THOMAS WHITTLE HOPWOODPHILIPSON, AND PERCY CLARK- SON PHILIPSON, OF BOLTON, ENGLAND.

APPARATUS FOR STRETCHING FABRICS.

Application filed March 4, 1911.

land Street /VOiliS, Astley Bridge, Bolton, in

the county of Lancaster, England, have in rented a certain new anduseful Improvement Appertaining to Apparatus for Stretching Fabrics, ofwhich the following description is a specification.

It relates to that type of apparatus for stretching fabrics known asrevolving stretchers the same being employed in connection withbleaching, washing and like machinery. These stretchers consist of anumber of ribbed or toothed rails which are arranged to travel in acircular path while they are also movable in the direction of theirlength so as to cause more or less lateral stretch of the fabric passingover them, and our said invention consists in an improvement in thedevices through or by which said longitudinal movements are transmittedto said rails by which improved devices the movement thereby given tosaid rails may be extended to a greater length than is the case withthose devices as heretofore made use of.

In the accompanying sheet of drawing which illustrates our saidinvention: Figure l is a sectional plan of a revolving stretcher havingour improved parts applied thereto. Fig. 2 is a sectional end elevationon line A-B of Fig. 1. Fig. 3 is a side elevation of a certain part ofsaid revolving stretcher, hereinafter referred to. Fig. 4 is a sideelevation of our improved block or bearing. Fig. 5 is an elevationthereof as seen at right angles to that shown by Fig. 4. Fig. 6 is asectional side elevation of our improved parts. Fig. 7 is also asectional side elevation thereof as seen at right angles to Fig. 6.Figs. t to 7 inclusive are drawn to an enlarged scale as compared withthe other views.

In carrying out our invention we provide the usual rotative series oflongitudinally movable rails d to perform the usual stretching upon thecloth. The cam or cams a, under our invention, will be pivotally mountedat 0 upon bracket 0 which are suitably supported independent of theshaft f. By means of a screw such as shown at b the angle of the camrelative to the axis of rota- Specification of Letters Patent.

Patented July 22, 1913.

Serial No. 612,427.

tion of the series of rotatively mounted rails may be adjusted, the camswinging on the pivot c. As shown by comparing Figs. 1 and 2, the cam ahas fiat, parallel opposing faces. The side a is preferably removable tofacilitate assembling. Fitted to slide between the opposing flat facesof the cam are boxes it, these boxes being entirely independent of eachother so that movement of one relatively to the cam faces will beindependent of movement of the others. Each block or box is formed withan opening or recess h which is spherical in form, as indicated in Fig.6. Said spherical recess receives the spherical head 9 of a stud gprojecting inwardly from a rail (Z. To facilitate assembling of theboxes with the stud heads, they are formed with removable cover plates kheld in place by screws h lVhen the rails (Z are acted upon by the stripof cloth being passed there-over so that said rails as a series, revolveabout the axis of shaft f, said rails are caused to reciprocate or movelongitudinally by reason of their studs and the spherical heads thereofbeing engaged by the boxes 71 which latter must follow the contour ofthe annular space provided between the opposing fiat faces of the cam.The flat sides of the boxes slide freely between the flat opposing facesof the cams so as to oppose the least possible resistance to themovements of the parts under the influence of the passing web of cloth.As the boxes move around the cam they of course shift to differentdistances relatively to the axis of rotation, and this amount ofshifting is increased when the cam is shifted on its pivot 0 so as toimpart greater length of reciprocation to the rails (Z.

The cam around which the boxes rotate is obviously stationary so far asregards to tary motion, and the amount of stretching to be imparted tothe cloth is controlled by al tering the angle of such camf The cam isnot mounted on the shaft but on an independent support, and theengagement of the spherical heads g with the spherical shaped recessesof the blocks is such that there can be no disengagement, or unduefriction, during the rotation of the blocks around the cam, this beingtrue whether the angle of the cam is changed materially or not from theposition shown in Fig. 1.

As has been stated, Fig. 7 is a sectional side elevation at a rightangle to Fig. 6.

By comparing these two figures it will be seen that the boxes and thestuds have cooperating guiding portions which will prevent rockingmovement of the boxes on the heads 9 in a direction around the cam.These cooperating guiding portions comprise the -shoulders at each sideof the entrance to the spherical recesses in the boxes h. In otherWords, the boxes h are con-' tracted so as to present parallel walls tlirou'gh which the stem of each stud projects. The result is that,whilethestructure permits a great, amount of relative movement of thestuds and boxes in one direction, the're -isjpractically nofrelativemovement'in the otlmrdirecnon. "In other words, the structure resultsinconfining the relative movement between the "studs and boxes to adirection parallel with the traverse "movement of the bar, and permitsof ample movement in this direction While preventing movement at a rightangle to that required for allowing such traverse of the bar.

We claim V 1. A cloth stretcher comprising adjustable non-rotary camshaving jparallel opposing flat surfaces, longitudinally movable railsmounted to rotateabo'ut said cams and having inwardly {projecting studsprovided with heads, and independent boxes having flat sides engagingthe opposing flat surfaces of i "the cams, said boxes having recessesfor'th'e said stud heads, "the boxesand studs'having cooperating guidingportions to prevent rocking movement of the boxes in'a direc-; tionaround the cams.

-"2. A cloth stretcher comprising adj ustable- ;non-rotary cams havingpara-llel opposing flat surfaces, longitudinally movable .rails mountedto rotate about said cams and hav ing' inwardly projecting studsproi'rided'with having inwardly projecting studs provided with sphericalheads, and independent boxes having flat sides engaging the opposingflat surfaces of the cams, said boxes having spherical-shaped recessesfor the said stud heads, said boxes having parallel shoulders to co-actwith the stems of the studs to prevent rocking movement of the boxes ina direction around the cams.

4. A cloth stretcher comprising adjustable non-rotary cams havingparallel opposing flat surfaces, longitudinally movable rails mounted torotate about said cams and having inwardly projecting studs providedwith spherical heads, and independent boxes having'flat'sidesengagingthe opposing flat surfaces of the cams, said boxes havingspherical-shaped recesses for the said stud heads,

the cams having removable side members, "the boxes and studs havingcooperating guiding portions to prevent rocking movement ofthe boxes ina direction around the cams.

WILLIAM PHILIPSO'N. THOMAS WHITTL'E 'HOPWOOD PHILIPSON. PERCY C'LARKSUNPHILIPSON. itnesses JOHN WILLIAM THoMAs, ERN'ALD SIMPSON MosELnY.

Copies of thisrpatent maybe obtained for five cents each, by addressingthe Commissioner of Patents,

WashingtonfD. C.

